In frontotemporal dementia (FTD), apathy is reported to negatively impact the prognosis and survival of patients. The study of genetic FTD in its pre‐symptomatic period permits the investigation of markers in the early stages of disease progression. Therefore, in pre‐symptomatic gene carriers in the multicentre Genetic FTD Initiative (GENFI), we examined longitudinal apathy changes in association with cognitive decline over time, and baseline measures of atrophy.